> For the complete documentation index, see [llms.txt](https://arcton.gitbook.io/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://arcton.gitbook.io/documentation/liquidity/amm-v2/dual-type-liquidity.md).

# Dual Type Liquidity

### Liquidity Model

For our token pairs we use the standard constant product formula:

$$
x  \*y = k
$$

### Liquidity Pairs

Our liquidity pools always consist of startup shares and USDC, with a weight of 50% each. For every startup we set up a new liquidity pool.

{% hint style="danger" %}
We use a **single liquidity pool** for each offering, which will be announced on [www.arcton.com](http://www.arcton.com) after every raise. It is imperative that investors exercise caution when engaging with alternative pools.
{% endhint %}

### Fees

For every pair we use the same stable fee structure. We don't differentiate between buy- and sale-orders as ultimately both contribute to liquidity.